AP3917B

AP3917B

Document overview

• Manufacturer or author: Diodes Incorporated
• PDF pages: 12

Technical content

Features

• Universal 85VAC to 300VAC Input Range
• Internal MOSFET of 650V
• Maximal Peak Current: 280mA Typical
• Improved Constant Voltage: ±5%
• Maximum 170mA Rated Output Current
• No Load Power Consumption: < 30mW with External Bias
• Frequency Modulation to Suppress EMI
• Various Protections: OTP (Over-Temperature Protection), OLP (Overload Protection), SCP (Short Circuit Protection)
• Fewer Components
• Low Audible Noise Solution
• SO-7 Package
• Moisture Sensitivity: MSL Level 3 per J-STD-020
• Terminals: Finish – Matte Tin Plated Leads, Solderable per M2003 JESD22-B102, Method 208
• Weight: 0.077 grams (Approximate)
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen- and Antimony-Free. “Green” Device (Note 3)
• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Pin Assignments (Top View) NC 1 NC 2 Drain7 S 3 FB6 S 4 BP5 SO-7

Applications

• Non-Isolated Home Appliances: AC Fans, Rice Cookers, Shavers; Milk Machines
• IoT Applications
• Industrial Controls
• Standby and Auxiliary Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant . 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

Document number: DS41277 Rev. 8 - 2 2 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B Typical Applications Circuit C2 R4 GND C 3 L1 C5C4 BP FB S S NC NCDrain AP3917B D1C1 L2F1 DB1 L N R3 C6 Pin Descriptions Pin Number Pin Name Function 1, 2 N/C Not Connected Internally. Recommend to connect to Source for better heat dissipation. 3, 4 S Internal Power MOSFET Source. Ground Reference for BP and FB Pins. 5 BP Connection Point of External Bypass Capacitor for Internally Generated Control Circuit Power Supply. 6 FB Regulator Feedback. 7 Drain Internal Power MOSFET Drain. High-Voltage Current Source Input. Functional Block Diagram BP FB CS Limit Protection Logic Power FB Control DriverVREF VLIMIT RCS S Drain 3,4

Document number: DS41277 Rev. 8 - 2 3 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B Absolute Maximum Ratings (Note 4) Notes: 4. Stresses greater than those listed under Absolute Maximum Ratings can cause permanent damage to the device. These are stress ratings only , and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings for extended periods can affect device reliability. 5. Test condition: Device mounted on FR-4 substrate PC board, 2oz copper, with 1inch2 cooling area. Recommended Operating Conditions Symbol Parameter Min Max Unit VBP Supply Voltage 8.2 8.8 V VDSS Drain-Source Voltage (Note 6) — 520 V TA Ambient Temperature -40 +125 °C Notes: 6. The drain-source voltage is 80% of VDS in the aging condition. Symbol Parameter Rating Unit VDSS Drain Pin Voltage -0.7 to 650 V VBP Internally Generated Control Circuit Power Supply Voltage 8.9 V VFB, VS FB Pin and S Pin Voltage -0.7 to 5.5 V PD Continuous Power Dissipation (TA = +25°C) 1 W TJ Operating Junction Temperature +150 °C TSTG Storage Temperature -65 to +150 °C TLEAD Lead Temperature (Soldering, 10s) +300 °C θJA Thermal Resistance (Junction to Ambient)(Note 5) 95 °C/W θJC Thermal Resistance (Junction to Case) 13.5 °C/W — ESD (Human Body Model) 4000 V — ESD (Charge Device Model) 1000 V

Document number: DS41277 Rev. 8 - 2 4 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B Electrical Characteristics (VBP = 8.2V, -40°C <TA<+125°C, unless otherwise specified.) Symbol Parameter Condition Min Typ Max Unit HV Pin Startup Current Source IHV HV Supply Current VBP = 7V, VDRAIN = 100V — 3.5 — mA ILEAK Leakage Current of Drain Pin VBP = 8.7V, VDRAIN = 400V, TA = +25°C — 10 12 µA VBP Voltage Management VBP_HVOFF VBP Increasing Level at which HV Supply is OFF — 8.1 8.5 8.8 V VBP_HVON VBP Decreasing Level at which HV Supply is ON — 7.8 8.2 8.6 V VBP_HYS VBP Hysteresis (VBP_HVOFF - VBP_HVON) — — 280 — mV VBP_UVLO VBP Minimum Operating Voltage TA = +25°C — 6.5 — V VBP_RESTART VBP Restart Voltage — — 4.5 — V IBP1 VBP Operating Current with MOSFET Switching VBP = 8.5V, f = 37kHz, IBP2 VBP Quiescent Current with No Switching TA = +25°C — 110 200 µA IBP_LATCH VBP Latch Off-Current VBP = 8.8V, TA = +25°C — 26 — µA Internal MOSFET VDS Breakdown Voltage TA = +25°C (Note 7) 650 — — V RDS(ON) ON Resistance TA = +25°C, ID = 0.4A — — 16 Ω Internal Current Sense IPK_MAX Maximum Peak Current TA = +25°C 230 280 330 mA tLEB1 Leading-Edge Blanking TA = +25°C — 250 400 ns ISCP Current Set Point for Short Circuit Protection TA = +25°C 320 390 460 mA tLEB2 Leading-Edge Blanking for Short Circuit Protection TA = +25°C — 200 — ns Feedback Input (FB Pin) tMINOFF Minimum Off-Time TA = +25°C 12.5 17.5 22.5 µs VFB MOSFET Feedback Switch-On Threshold — 2.4 2.5 2.6 V VFB_OLP Overload Protection Feedback Trigger Threshold — 1.56 1.7 1.84 V tOLP Overload Protection Delay Time f = 36kHz — 170 — ms VOLD Open-Loop Detection Voltage TA = +25°C — 60 — mV tOLD Open-Loop Detection Blanking Time f = 15kHz, TA = +25°C — 4.3 — ms Over-Temperature Protection TOTP Thermal Shutdown Threshold (Note 8) — +135 +150 +165 °C Notes: 7. The drain-source voltage is 80% of VDS in the aging condition. 8. Guaranteed by design.

Document number: DS41277 Rev. 8 - 2 5 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B Performance Characteristics FB Voltage vs. Ambient Temperature VBP_HVON Voltage vs. Ambient Temperature VBP_HVOFF Voltage vs. Ambient Temperature RDS(ON) vs. Ambient Temperature -40 -25 -10 5 20 35 50 65 80 95 110 125 1.5 2.0 2.5 3.0 3.5 VFB (V) Ambient Temperature ( o -40 -25 -10 5 20 35 50 65 80 95 110 125 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 VBP_HVON （V ） Ambient Temperature ( o -40 -25 -10 5 20 35 50 65 80 95 110 125 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 VBP_HVOFF （V ） Ambient Temperature ( o VBP_HVOFF (V) VBP_HVON (V) -40 -25 -10 5 20 35 50 65 80 95 110 125 RDS(ON) (Ω) Ambient Temperature ( o

Document number: DS41277 Rev. 8 - 2 7 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B Performance Characteristics (continued) The value of R5 can be determined by the following equation: R5 = 𝑉𝑂 −𝑉𝐵𝑃_𝐻𝑉𝑂𝑁 𝐼𝐵𝑃2 Constant Voltage Operation The AP3917B can be used in a buck circuit, as shown in the typical application circuit. In the beginning of each cycle, the internal integrated MOSFET turns ON when the FB voltages fall below the reference voltage VFB (2.5V). The FB voltage derives from the sampling capacitor voltage, which can reflect output voltage. The ON period time is determined by the inductor current variable value ∆IL, (∆IL is the gap of the peak-current limitation value IPK and the initial inductor current value IINI), the inductance value, and the input voltage. The ON time calculation is as follows: DC_IN INIPK DC_IN ON V IILV ILt −⋅=∆⋅= L Where INII is zero in DCM status. When the inductor current reaches peak-current limitation, the internal MOSFET will turn off. The inductor current charges the sampling capacitor (C5) and the output capacitor (C3) via the freewheeling diodes D2 and D1 respectively. In this stage, the sampling capacitor voltage reflects the output voltage. The output voltage can be regulated by sampling the FB voltage. In the MOSFET OFF time, the inductor current decreases linearly from peak current. When the inductor current falls below the output current, the FB voltage begins to decrease with the sampling capacitor voltage decreasing. Once the FB voltage is detected below the reference voltage VFB (2.5V), a new switching cycle starts. The regulated output voltage can be described as the following equation: RR(VV FBO +×= Figures 3(a) and 3(b) show the operation diagram under DCM and CCM. Driver IINDUCTANCE VO IO VFB=2.5VVFB_SAMPLE IPK LIMIT Driver IINDUCTANCE VO IO VFB=2.5VVFB_SAMPLE IPK LIMIT Figure 3(a). DCM Figure 3(b).CCM Startup Control A three-stage control method is designed for soft start function in startup process. During these stages, the OFF time reduces from 70µs to 35µs in stage I, then from 35µs to 17.5µs (t MINOFF) in stage II. Every stage has 128 switching cycles (see Figure 4), but once the output voltage reaches the rated value, the startup process ends no matter what stage it is, then AP3917B enters normal operation mode.

to VBP_RESTART (4.5V), the internal high-voltage regulator turns on to charge the external BP capacitor. OLD (60mV), the AP3917B stops working, and begins a restart cycle. The open-loop detection is blanked for 64 switching cycles during startup process. capacitor C6 (390pF to 1nF) in Figure 6. Figure 6. Overshoot Improvement edge blanking time is tLEB2. During this period, the current limit comparator is disabled, and the gate driver cannot be switched off.

Document number: DS41277 Rev. 8 - 2 10 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B

Ordering Information

13 : 13" Tape & ReelS7 : SO-7 Product Name Package Part Number Marking ID 13’’Tape and Reel Quantity Part Number Suffix SO-7 AP3917BS7-13 3917B 4000/Tape and Reel -13 Marking Information Package Type: SO-7 3917B (Top View) YY WW X X Logo WW : Week : 01~52; 52 YY : Year : 19, 20, 21 ~ X X : Internal Code represents 52 and 53 week Marking ID

Document number: DS41277 Rev. 8 - 2 11 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. SO-7 SO-7 Dim Min Max Typ A2 1.40 1.50 1.45 A1 0.10 0.20 0.15 b 0.30 0.50 0.40 c 0.15 0.25 0.20 D 4.85 4.95 4.90 E 5.90 6.10 6.00 E1 3.80 3.90 3.85 E1a 3.85 3.95 3.90 e — — 1.27 h — — 0.35 L 0.62 0.82 0.72 Q 0.60 0.70 0.65 All Dimensions in mm Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. SO-7 Dimensions Value (in mm) C 1.270 X 0.802 X1 4.612 Y 1.505 Y1 6.500 b e E 9° ( All sides) 4°±3° c Qh 45° R 0.1 D E1a L Seating Plane Gauge Plane C X Y

Document number: DS41277 Rev. 8 - 2 12 of 12 www.diodes.com October 2020 © Diodes Incorporated AP3917B IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other c hanges without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or sy stems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety -critical, life support devices or systems, notwithstanding any devices - or systems -related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2020, Diodes Incorporated www.diodes.com